coming up next, nelson mandela's leadership, his legacy. but first "nbc nightly news" anchor brian williams sat down in south africa with former president jimmy carter earlier today. >> gandhi and king as some of the major figures of the last hundred years, where do you put him? >> i think so. i would say gandhi, martin luther king, jr., and nelson mandela would be in the forefront along with mother teresa, a, those who you look on with a great deal of gratification. they came through with flying colors. they inspired other people. to emulate their moral values as best they could. i think that nelson will go down in history as one of the leading people of this century. >> you can see more of brian williams interview with former president jimmy carter, a member of the elders created by nelson mandela tonight on a special edition of "nbc nightly news" from south africa. we'll be right back. [ female announcer ] at 100 calories, not all food choices add up. some are giant. some not so giant. when managing your weight, bigger is always better.